What do you think of these upgrades for my PC?

First of all this is for my first PC build, bought everything off NewEgg and everything worked perfect!! Anyways, I need to buy some upgrades desperatley so here is some items I will be picking up frist, then Ill do another 4gbs of Ram(6 total) and a nice quad core cpu!

Keeping those items in mind here is what I'm looking at. Specifically let me know about the PSU...will this handle my cpu, ram, and an 8800GS?

Any other questions let me know =)

what were you upgrading from?

Im upgrading from a 500W psu that came with my case, its a piece. and a 5 or 6 year old 80GB hard drive(thats full right now)
and yeah Im slowly upgrading right now, my graphics cards will be on the list soon. but really I only play wow and counterstrike and it does a great job with those games...

Anyway, I was talking to some friends and have decided to do a corsair for sure!